Aviation Regulatory Definitions and Standards (ATA, IETM, RFQ)
Aviation procurement and maintenance operations rely on standardized frameworks and procedures to ensure safety, compliance, and interoperability across the industry. Key among these are regulatory definitions,…
Aviation procurement and maintenance operations rely on standardized frameworks and procedures to ensure safety, compliance, and interoperability across the industry. Key among these are regulatory definitions, technical standards, and procurement practices that guide sourcing, documentation, and certification processes.
Request for Quotation (RFQ) in Procurement
An RFQ (Request for Quotation) is a formal procurement document used to solicit price quotes from suppliers for specific goods or services. In aviation procurement, RFQs are commonly issued for components, spare parts, maintenance services, or equipment. They typically include detailed specifications, quantities, delivery requirements, and terms and conditions. RFQs enable buyers to compare offers from multiple suppliers, facilitating competitive pricing and informed decision-making. In some cases, procurement may involve sole sourcing, where a buyer directly awards a contract to a single supplier without a competitive bidding process, often due to proprietary technology, urgency, or regulatory constraints.
ATA Specifications and Standards
The Air Transport Association — now A4A (Airlines for America) — developed several distinct specifications used in aviation procurement, technical publications, and supply-chain data exchange. These are frequently conflated in industry usage, so it is important to delineate them clearly.
ATA Spec 100 and iSpec 2200 (Technical Manual Content)
ATA Spec 100 was the foundational standard for organising aircraft technical documentation, structuring information into numbered chapters by system (e.g., Chapter 32: Landing Gear, Chapter 24: Electrical Power). It was superseded by ATA iSpec 2200, which extended the chapter numbering into the digital era with SGML/XML data modules for technical publications. iSpec 2200 remains in active use across legacy commercial fleets but has been largely superseded for new aircraft programmes by S1000D.
ATA Form 106 (Parts Traceability)
ATA Form 106 is a single-page Used Material Certification form used in aviation parts trading. It is filled out by sellers — typically certified repair stations, parts distributors, or operators — to certify the maintenance, airworthiness, and teardown history of a part being sold. It is a parts-traceability document, not a data-exchange standard, and accompanies the physical part through the supply chain alongside any FAA 8130-3 or EASA Form 1 release certificate.
ATA Spec 2000 (Supply-Chain Data Exchange)
ATA Spec 2000 is the XML / EDI standard for B2B electronic data exchange across the aviation supply chain. Originally developed jointly by ATA (now A4A) and IATA to replace paper forms in spare-parts logistics, it defines message schemas for electronic ordering, parts master data, purchase orders, invoices, shipment notifications, and supplier evaluation. RFQ messages are defined in Chapter 12 of ATA Spec 2000, providing a standardised electronic equivalent of the procurement RFQ document described above.
S1000D (Modern Technical Publications)
S1000D is the international specification for technical publications, co-developed by the AeroSpace and Defence Industries Association of Europe (ASD), the Aerospace Industries Association (AIA), and NATO. It uses XML data modules and a Common Source Database (CSDB) to author content once and deliver it to multiple output formats. New transport-category aircraft programmes — the A380, A350, and B787 among them — use S1000D for IETP/IETM authoring.
Interactive Electronic Technical Manuals (IETMs)
An IETM (Interactive Electronic Technical Manual) is a software-rendered technical publication used for aircraft maintenance, repair, and operations. IETMs are authored under a content standard — typically S1000D for newer programmes or iSpec 2200 for legacy fleets — and rendered through dedicated viewer software. Unlike static PDFs, IETMs provide hyperlinked navigation, search, multimedia integration, and traceable revision control, enabling technicians to access procedures and ensure compliance more efficiently.
Standards for IETMs
Several standards govern IETM content and delivery:
- S1000D: International specification used by most new commercial and defence aircraft programmes; XML data modules with a Common Source Database.
- ATA iSpec 2200: Predominant in legacy commercial fleets; chapter-based structure inherited from ATA Spec 100.
- MIL-STD-40051 / MIL-DTL-87268 / MIL-PRF-87269: U.S. military standards covering IETM authoring, interactivity classes, and quality assurance.
The choice of standard depends on the operator's regulatory environment, aircraft type, and organisational requirements.
Stewardship of ATA Standards
ATA Form 106, ATA Spec 2000, and ATA iSpec 2200 are maintained by A4A (Airlines for America) in collaboration with industry stakeholders including IATA, OEMs, and MROs. Conformance to these standards is the responsibility of the data originator — typically the OEM, repair station, parts distributor, or technical publication provider.
Key Takeaways
- An RFQ is a procurement tool for soliciting competitive quotes; ATA Spec 2000 Chapter 12 defines the electronic RFQ message schema for B2B supply-chain use.
- ATA Form 106 is a single-page parts-traceability certification, distinct from ATA Spec 2000 (data exchange) and ATA iSpec 2200 (technical manual content).
- IETMs are software-rendered manuals authored under S1000D (modern programmes) or ATA iSpec 2200 (legacy fleets).
- S1000D, co-developed by ASD/AIA/NATO, is the prevailing content standard for new transport-category aircraft technical publications.